The difference of speed of light in the two media \( A \) and \( B \) \( \left(v_{A}-v_{B}\right...

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The difference of speed of light in the two media \( A \) and \( B \) \( \left(v_{A}-v_{B}\right) \) is \( 2.6 \times 10^{7} \mathrm{~m} / \mathrm{s} \). If the refractive index of medium \( B \) is 1.47 , then the ratio of refractive index of medium \( B \) to medium \( A \) is: (Given : speed of light in vacuum \( \left.c=3 \times 10^{8} \mathrm{~ms}^{-1}\right) \)
(a) 1.303
(b) 1.318
(c) 1.13
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